修改comment

src/com/hellogithub/servlet/commentServlet.java

@@ -1,5 +1,6 @@
 package com.hellogithub.servlet;
 
+import com.alibaba.fastjson.JSONObject;
 import com.hellogithub.entity.userEntity;
 import com.hellogithub.service.commentService;
 import jakarta.servlet.ServletConfig;
@@ -15,6 +16,8 @@ import java.io.PrintWriter;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.Date;
+import java.util.HashMap;
+
 @WebServlet("/comment")
 public class commentServlet extends HttpServlet {
     private com.hellogithub.service.commentService commentService = new commentService();
@@ -52,8 +55,33 @@ public class commentServlet extends HttpServlet {
         PrintWriter writer = resp.getWriter();
         HttpSession session  =req.getSession();
         userEntity userEntity=(userEntity)session.getAttribute("user");
-        String username=userEntity.getUserName();
-        writer.println(commentService.insertComment(username,Integer.parseInt(proId),content,Integer.parseInt(isUsed),now,Integer.parseInt(star)));
+        if(userEntity ==null){
+            setResultError("用户未登录",writer);
+        }else{
+            String username=userEntity.getUserName();
+            int num = commentService.insertComment(username,Integer.parseInt(proId),content,Integer.parseInt(isUsed),now,Integer.parseInt(star));
+            if(num == 0){
+                setResultError("评论失败",writer);
+            }else{
+                setResultOK("success",writer);
+            }
+        }
+       writer.close();
+    }
+    public void setResult(Integer code, String msg, PrintWriter writer) {
+        HashMap<String, Object> result = new HashMap<>();
+        result.put("code", code);
+        result.put("msg", msg);
+        String jsonString = JSONObject.toJSONString(result);
+        writer.println(jsonString);
         writer.close();
     }
+
+    public void setResultError(String msg, PrintWriter writer) {
+        setResult(500, msg, writer);
+    }
+
+    public void setResultOK(String msg, PrintWriter writer) {
+        setResult(200, msg, writer);
+    }
 }